Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual rótulo tem um País de Canadá e um Formato de CD/download digital?
 ###Tabelas: CREATE TABLE gp2_series (gp2_series_id AUTO_INCREMENT PRIMARY KEY, Year INT, Drivers VARCHAR, Races INT, Wins INT, Poles INT, F.L. INT, Points INT, D.C. VARCHAR, T.C. VARCHAR) CREATE TABLE arab_violence (arab_violence_id AUTO_INCREMENT PRIMARY KEY, Conflicts prior to Israel's independence VARCHAR, Military deaths VARCHAR, Civilian deaths VARCHAR, Total deaths VARCHAR, Military and/or Civilian wounded VARCHAR, Total casualties VARCHAR) CREATE TABLE release_history (release_history_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Date VARCHAR, Label VARCHAR, Format VARCHAR, Catalogue number(s) VARCHAR) CREATE TABLE comparison_of_toy_group_breeds_of_major_kennel_clubs (comparison_of_toy_group_breeds_of_major_kennel_clubs_id AUTO_INCREMENT PRIMARY KEY, The Kennel Club (UK) Toy Group VARCHAR, Canadian Kennel Club Toy Dogs Group VARCHAR, American Kennel Club Toy Group VARCHAR, Australian National Kennel Council Toy Dogs Group VARCHAR, New Zealand Kennel Club Toy Group VARCHAR) CREATE TABLE seasonal_ratings (seasonal_ratings_id AUTO_INCREMENT PRIMARY KEY, Season INT, Episodes INT, Timeslot (ET) VARCHAR, Season Premiere VARCHAR, Season Finale VARCHAR, TV Season VARCHAR, Rank VARCHAR, Viewers (in millions) VARCHAR)  
SELECT Label FROM release_history WHERE Country = canada AND Format = cd/digital download